Rod a of cup 2 is connected by turning pair A to sleeve 5 which slides along the axis of lever 6. Lever 6 turns about fixed axis B. Stem b of valve 3 is connected by turning pair C to sleeve 7 which also slides along the axis of lever 6. When the pressure in the left portion of pipe 1 increases, cup 2 is raised, valve member 3 is lowered and the delivery of fluid into pipeline 4 is reduced.When the pressure in the left portion of pipe 1 drops, cup 2 is lowered, valve member 3 is raised and the delivery of fluid is increased.
$3893$LHP,Rg$